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How to find all occurrences of an element in a list?
...can use a list comprehension:
indices = [i for i, x in enumerate(my_list) if x == "whatever"]
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What is the correct syntax for 'else if'?
...om 2.6.4 to 3.1.1. Everything has gone fine until I tried to use the 'else if' statement. The interpreter gives me a syntax error after the 'if' in 'else if' for a reason I can't seem to figure out.
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How do you remove a specific revision in the git history?
...o combine revision 3 and 4 into a single revision, you can use git rebase. If you want to remove the changes in revision 3, you need to use the edit command in the interactive rebase mode. If you want to combine the changes into a single revision, use squash.
I have successfully used this squash te...
Check if option is selected with jQuery, if not select a default
Using jQuery, how do you check if there is an option selected in a select menu, and if not, assign one of the options as selected.
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How to remove a key from Hash and get the remaining hash in Ruby/Rails?
...as an except/except! method that returns the hash with those keys removed. If you're already using Rails, there's no sense in creating your own version of this.
class Hash
# Returns a hash that includes everything but the given keys.
# hash = { a: true, b: false, c: nil}
# hash.except(:c...
How do you split a list into evenly sized chunks?
...59],
[60, 61, 62, 63, 64, 65, 66, 67, 68, 69],
[70, 71, 72, 73, 74]]
If you're using Python 2, you should use xrange() instead of range():
def chunks(lst, n):
"""Yield successive n-sized chunks from lst."""
for i in xrange(0, len(lst), n):
yield lst[i:i + n]
Also you can s...
How to know if two arrays have the same values
...
function arraysEqual(_arr1, _arr2) {
if (!Array.isArray(_arr1) || ! Array.isArray(_arr2) || _arr1.length !== _arr2.length)
return false;
var arr1 = _arr1.concat().sort();
var arr2 = _arr2.concat().sort();
for (var i = 0; i < arr1.length; i...
Sorting a Python list by two fields
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how will i proceed if i want to sort ascending on one element and descending on other, using itemgetter??.
– ashish
Oct 12 '13 at 10:13
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How is __eq__ handled in Python and in what order?
...ow how to compare themselves to B's, Python tries invoking B.__eq__ to see if it knows how to compare itself to an int.
If you amend your code to show what values are being compared:
class A(object):
def __eq__(self, other):
print("A __eq__ called: %r == %r ?" % (self, other))
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What is the difference between print and puts?
For example in this line of code I wrote, print and puts produce different results.
6 Answers
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